1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
618 lines
17 KiB
C
618 lines
17 KiB
C
/******************************************************************************
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*
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* Module Name: dsobject - Dispatcher object management routines
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acparser.h>
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#include <acpi/amlcode.h>
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#include <acpi/acdispat.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dsobject")
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#ifndef ACPI_NO_METHOD_EXECUTION
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/*****************************************************************************
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*
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* FUNCTION: acpi_ds_build_internal_object
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*
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* PARAMETERS: walk_state - Current walk state
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* Op - Parser object to be translated
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* obj_desc_ptr - Where the ACPI internal object is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Translate a parser Op object to the equivalent namespace object
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* Simple objects are any objects other than a package object!
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*
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****************************************************************************/
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acpi_status
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acpi_ds_build_internal_object (
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struct acpi_walk_state *walk_state,
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union acpi_parse_object *op,
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union acpi_operand_object **obj_desc_ptr)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status;
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ACPI_FUNCTION_TRACE ("ds_build_internal_object");
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*obj_desc_ptr = NULL;
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if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
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/*
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* This is an named object reference. If this name was
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* previously looked up in the namespace, it was stored in this op.
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* Otherwise, go ahead and look it up now
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*/
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if (!op->common.node) {
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status = acpi_ns_lookup (walk_state->scope_info, op->common.value.string,
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ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
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ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL,
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(struct acpi_namespace_node **) &(op->common.node));
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if (ACPI_FAILURE (status)) {
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ACPI_REPORT_NSERROR (op->common.value.string, status);
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return_ACPI_STATUS (status);
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}
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}
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}
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/* Create and init the internal ACPI object */
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obj_desc = acpi_ut_create_internal_object ((acpi_ps_get_opcode_info (op->common.aml_opcode))->object_type);
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if (!obj_desc) {
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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status = acpi_ds_init_object_from_op (walk_state, op, op->common.aml_opcode, &obj_desc);
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if (ACPI_FAILURE (status)) {
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acpi_ut_remove_reference (obj_desc);
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return_ACPI_STATUS (status);
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}
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*obj_desc_ptr = obj_desc;
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return_ACPI_STATUS (AE_OK);
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}
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/*****************************************************************************
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*
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* FUNCTION: acpi_ds_build_internal_buffer_obj
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*
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* PARAMETERS: walk_state - Current walk state
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* Op - Parser object to be translated
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* buffer_length - Length of the buffer
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* obj_desc_ptr - Where the ACPI internal object is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Translate a parser Op package object to the equivalent
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* namespace object
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*
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****************************************************************************/
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acpi_status
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acpi_ds_build_internal_buffer_obj (
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struct acpi_walk_state *walk_state,
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union acpi_parse_object *op,
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u32 buffer_length,
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union acpi_operand_object **obj_desc_ptr)
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{
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union acpi_parse_object *arg;
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union acpi_operand_object *obj_desc;
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union acpi_parse_object *byte_list;
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u32 byte_list_length = 0;
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ACPI_FUNCTION_TRACE ("ds_build_internal_buffer_obj");
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obj_desc = *obj_desc_ptr;
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if (obj_desc) {
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/*
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* We are evaluating a Named buffer object "Name (xxxx, Buffer)".
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* The buffer object already exists (from the NS node)
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*/
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}
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else {
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/* Create a new buffer object */
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obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER);
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*obj_desc_ptr = obj_desc;
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if (!obj_desc) {
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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}
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/*
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* Second arg is the buffer data (optional) byte_list can be either
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* individual bytes or a string initializer. In either case, a
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* byte_list appears in the AML.
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*/
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arg = op->common.value.arg; /* skip first arg */
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byte_list = arg->named.next;
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if (byte_list) {
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if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Expecting bytelist, got AML opcode %X in op %p\n",
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byte_list->common.aml_opcode, byte_list));
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acpi_ut_remove_reference (obj_desc);
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return (AE_TYPE);
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}
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byte_list_length = (u32) byte_list->common.value.integer;
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}
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/*
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* The buffer length (number of bytes) will be the larger of:
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* 1) The specified buffer length and
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* 2) The length of the initializer byte list
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*/
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obj_desc->buffer.length = buffer_length;
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if (byte_list_length > buffer_length) {
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obj_desc->buffer.length = byte_list_length;
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}
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/* Allocate the buffer */
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if (obj_desc->buffer.length == 0) {
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obj_desc->buffer.pointer = NULL;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Buffer defined with zero length in AML, creating\n"));
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}
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else {
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obj_desc->buffer.pointer = ACPI_MEM_CALLOCATE (
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obj_desc->buffer.length);
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if (!obj_desc->buffer.pointer) {
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acpi_ut_delete_object_desc (obj_desc);
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Initialize buffer from the byte_list (if present) */
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if (byte_list) {
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ACPI_MEMCPY (obj_desc->buffer.pointer, byte_list->named.data,
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byte_list_length);
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}
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}
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obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
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op->common.node = (struct acpi_namespace_node *) obj_desc;
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return_ACPI_STATUS (AE_OK);
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}
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/*****************************************************************************
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*
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* FUNCTION: acpi_ds_build_internal_package_obj
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*
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* PARAMETERS: walk_state - Current walk state
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* Op - Parser object to be translated
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* package_length - Number of elements in the package
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* obj_desc_ptr - Where the ACPI internal object is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Translate a parser Op package object to the equivalent
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* namespace object
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*
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****************************************************************************/
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acpi_status
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acpi_ds_build_internal_package_obj (
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struct acpi_walk_state *walk_state,
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union acpi_parse_object *op,
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u32 package_length,
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union acpi_operand_object **obj_desc_ptr)
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{
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union acpi_parse_object *arg;
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union acpi_parse_object *parent;
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union acpi_operand_object *obj_desc = NULL;
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u32 package_list_length;
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acpi_status status = AE_OK;
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u32 i;
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ACPI_FUNCTION_TRACE ("ds_build_internal_package_obj");
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/* Find the parent of a possibly nested package */
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parent = op->common.parent;
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while ((parent->common.aml_opcode == AML_PACKAGE_OP) ||
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(parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
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parent = parent->common.parent;
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}
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obj_desc = *obj_desc_ptr;
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if (obj_desc) {
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/*
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* We are evaluating a Named package object "Name (xxxx, Package)".
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* Get the existing package object from the NS node
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*/
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}
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else {
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obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_PACKAGE);
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*obj_desc_ptr = obj_desc;
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if (!obj_desc) {
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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obj_desc->package.node = parent->common.node;
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}
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obj_desc->package.count = package_length;
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/* Count the number of items in the package list */
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package_list_length = 0;
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arg = op->common.value.arg;
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arg = arg->common.next;
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while (arg) {
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package_list_length++;
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arg = arg->common.next;
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}
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/*
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* The package length (number of elements) will be the greater
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* of the specified length and the length of the initializer list
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*/
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if (package_list_length > package_length) {
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obj_desc->package.count = package_list_length;
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}
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/*
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* Allocate the pointer array (array of pointers to the
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* individual objects). Add an extra pointer slot so
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* that the list is always null terminated.
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*/
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obj_desc->package.elements = ACPI_MEM_CALLOCATE (
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((acpi_size) obj_desc->package.count + 1) * sizeof (void *));
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if (!obj_desc->package.elements) {
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acpi_ut_delete_object_desc (obj_desc);
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/*
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* Now init the elements of the package
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*/
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i = 0;
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arg = op->common.value.arg;
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arg = arg->common.next;
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while (arg) {
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if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
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/* Object (package or buffer) is already built */
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obj_desc->package.elements[i] = ACPI_CAST_PTR (union acpi_operand_object, arg->common.node);
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}
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else {
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status = acpi_ds_build_internal_object (walk_state, arg,
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&obj_desc->package.elements[i]);
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}
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i++;
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arg = arg->common.next;
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}
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obj_desc->package.flags |= AOPOBJ_DATA_VALID;
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op->common.node = (struct acpi_namespace_node *) obj_desc;
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return_ACPI_STATUS (status);
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}
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/*****************************************************************************
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*
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* FUNCTION: acpi_ds_create_node
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*
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* PARAMETERS: walk_state - Current walk state
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* Node - NS Node to be initialized
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* Op - Parser object to be translated
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create the object to be associated with a namespace node
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*
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****************************************************************************/
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acpi_status
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acpi_ds_create_node (
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struct acpi_walk_state *walk_state,
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struct acpi_namespace_node *node,
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union acpi_parse_object *op)
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{
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acpi_status status;
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union acpi_operand_object *obj_desc;
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ACPI_FUNCTION_TRACE_PTR ("ds_create_node", op);
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/*
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* Because of the execution pass through the non-control-method
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* parts of the table, we can arrive here twice. Only init
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* the named object node the first time through
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*/
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if (acpi_ns_get_attached_object (node)) {
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return_ACPI_STATUS (AE_OK);
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}
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if (!op->common.value.arg) {
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/* No arguments, there is nothing to do */
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return_ACPI_STATUS (AE_OK);
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}
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/* Build an internal object for the argument(s) */
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status = acpi_ds_build_internal_object (walk_state, op->common.value.arg, &obj_desc);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Re-type the object according to its argument */
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node->type = ACPI_GET_OBJECT_TYPE (obj_desc);
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/* Attach obj to node */
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status = acpi_ns_attach_object (node, obj_desc, node->type);
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/* Remove local reference to the object */
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acpi_ut_remove_reference (obj_desc);
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return_ACPI_STATUS (status);
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}
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#endif /* ACPI_NO_METHOD_EXECUTION */
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/*****************************************************************************
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*
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* FUNCTION: acpi_ds_init_object_from_op
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*
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* PARAMETERS: walk_state - Current walk state
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* Op - Parser op used to init the internal object
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* Opcode - AML opcode associated with the object
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* ret_obj_desc - Namespace object to be initialized
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize a namespace object from a parser Op and its
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* associated arguments. The namespace object is a more compact
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* representation of the Op and its arguments.
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*
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****************************************************************************/
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acpi_status
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acpi_ds_init_object_from_op (
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struct acpi_walk_state *walk_state,
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union acpi_parse_object *op,
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u16 opcode,
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union acpi_operand_object **ret_obj_desc)
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{
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const struct acpi_opcode_info *op_info;
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union acpi_operand_object *obj_desc;
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE ("ds_init_object_from_op");
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obj_desc = *ret_obj_desc;
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op_info = acpi_ps_get_opcode_info (opcode);
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if (op_info->class == AML_CLASS_UNKNOWN) {
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/* Unknown opcode */
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return_ACPI_STATUS (AE_TYPE);
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}
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/* Perform per-object initialization */
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switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
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case ACPI_TYPE_BUFFER:
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/*
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* Defer evaluation of Buffer term_arg operand
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*/
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obj_desc->buffer.node = (struct acpi_namespace_node *) walk_state->operands[0];
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obj_desc->buffer.aml_start = op->named.data;
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obj_desc->buffer.aml_length = op->named.length;
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break;
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case ACPI_TYPE_PACKAGE:
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/*
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* Defer evaluation of Package term_arg operand
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*/
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obj_desc->package.node = (struct acpi_namespace_node *) walk_state->operands[0];
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obj_desc->package.aml_start = op->named.data;
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obj_desc->package.aml_length = op->named.length;
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break;
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case ACPI_TYPE_INTEGER:
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switch (op_info->type) {
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case AML_TYPE_CONSTANT:
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/*
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* Resolve AML Constants here - AND ONLY HERE!
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* All constants are integers.
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* We mark the integer with a flag that indicates that it started life
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* as a constant -- so that stores to constants will perform as expected (noop).
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* (zero_op is used as a placeholder for optional target operands.)
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*/
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obj_desc->common.flags = AOPOBJ_AML_CONSTANT;
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switch (opcode) {
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case AML_ZERO_OP:
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obj_desc->integer.value = 0;
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break;
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case AML_ONE_OP:
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obj_desc->integer.value = 1;
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break;
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case AML_ONES_OP:
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obj_desc->integer.value = ACPI_INTEGER_MAX;
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/* Truncate value if we are executing from a 32-bit ACPI table */
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#ifndef ACPI_NO_METHOD_EXECUTION
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acpi_ex_truncate_for32bit_table (obj_desc);
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#endif
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break;
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case AML_REVISION_OP:
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obj_desc->integer.value = ACPI_CA_VERSION;
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break;
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown constant opcode %X\n", opcode));
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status = AE_AML_OPERAND_TYPE;
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break;
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}
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break;
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case AML_TYPE_LITERAL:
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obj_desc->integer.value = op->common.value.integer;
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break;
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Integer type %X\n", op_info->type));
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status = AE_AML_OPERAND_TYPE;
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break;
|
|
}
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_STRING:
|
|
|
|
obj_desc->string.pointer = op->common.value.string;
|
|
obj_desc->string.length = (u32) ACPI_STRLEN (op->common.value.string);
|
|
|
|
/*
|
|
* The string is contained in the ACPI table, don't ever try
|
|
* to delete it
|
|
*/
|
|
obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_METHOD:
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
|
|
|
switch (op_info->type) {
|
|
case AML_TYPE_LOCAL_VARIABLE:
|
|
|
|
/* Split the opcode into a base opcode + offset */
|
|
|
|
obj_desc->reference.opcode = AML_LOCAL_OP;
|
|
obj_desc->reference.offset = opcode - AML_LOCAL_OP;
|
|
|
|
#ifndef ACPI_NO_METHOD_EXECUTION
|
|
status = acpi_ds_method_data_get_node (AML_LOCAL_OP, obj_desc->reference.offset,
|
|
walk_state, (struct acpi_namespace_node **) &obj_desc->reference.object);
|
|
#endif
|
|
break;
|
|
|
|
|
|
case AML_TYPE_METHOD_ARGUMENT:
|
|
|
|
/* Split the opcode into a base opcode + offset */
|
|
|
|
obj_desc->reference.opcode = AML_ARG_OP;
|
|
obj_desc->reference.offset = opcode - AML_ARG_OP;
|
|
|
|
#ifndef ACPI_NO_METHOD_EXECUTION
|
|
status = acpi_ds_method_data_get_node (AML_ARG_OP, obj_desc->reference.offset,
|
|
walk_state, (struct acpi_namespace_node **) &obj_desc->reference.object);
|
|
#endif
|
|
break;
|
|
|
|
default: /* Other literals, etc.. */
|
|
|
|
if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
|
|
/* Node was saved in Op */
|
|
|
|
obj_desc->reference.node = op->common.node;
|
|
}
|
|
|
|
obj_desc->reference.opcode = opcode;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
|
|
default:
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unimplemented data type: %X\n",
|
|
ACPI_GET_OBJECT_TYPE (obj_desc)));
|
|
|
|
status = AE_AML_OPERAND_TYPE;
|
|
break;
|
|
}
|
|
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|